JRadio 按钮在 GridBagLayout 中“隐藏”

【问题标题】：JRadio Buttons are "Hiding" in GridBagLayoutJRadio 按钮在 GridBagLayout 中“隐藏”
【发布时间】：2012-12-20 11:04:57
【问题描述】：

请看下面的代码

package normal;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Form extends JFrame
{
    private JLabel heightLabel, weightLabel, waistLabel, neckLabel, hipsLabel,genderLabel,valuesLabel,bfPercentageLabel;
    private JLabel logoLabel; 

    private ImageIcon logo;

    private JTextField heightTxt, weightTxt, waistTxt, neckTxt, hipsTxt;

    private JRadioButton maleRadio, femaleRadio, inchesRadio, cmRadio;
    private ButtonGroup genderGroup, valuesGroup;

    private JComboBox percentageCombo;

    private JPanel centerPanel, northPanel, southPanel;


    public Form()
    {
        //Declaring instance variables  
        heightLabel = new JLabel("Height: ");
        weightLabel = new JLabel("Weight: ");
        waistLabel = new JLabel("Waist: ");
        neckLabel = new JLabel("Neck: ");
        hipsLabel = new JLabel("Hips: ");
        genderLabel = new JLabel("Gender: ");
        valuesLabel = new JLabel("Values in: ");


        logoLabel = new JLabel();
        logo = new ImageIcon(getClass().getResource("/images/calc_logo_final_2_edit.gif"));
        logoLabel.setIcon(logo);



        heightTxt = new JTextField(10);
        weightTxt = new JTextField(10);
        waistTxt = new JTextField(10);
        neckTxt = new JTextField(10);
        hipsTxt = new JTextField(10);

        maleRadio = new JRadioButton("Male");
        femaleRadio = new JRadioButton("Female");
        genderGroup = new ButtonGroup();
        genderGroup.add(maleRadio);
        genderGroup.add(femaleRadio);

        inchesRadio = new JRadioButton("Inches");
        cmRadio = new JRadioButton("Centimeters");
        valuesGroup = new ButtonGroup();
        valuesGroup.add(inchesRadio);
        valuesGroup.add(cmRadio);

        percentageCombo = new JComboBox();
        percentageCombo.addItem("No Value is Set");

        this.add(createNorthPanel(),"North");
        this.add(createCenterPanel(),"Center");
        this.setResizable(false);
        this.pack();
        this.setVisible(true);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


    }

    private JPanel createNorthPanel()
    {
        northPanel = new JPanel();
        northPanel.setLayout(new FlowLayout());

        northPanel.add(logoLabel);

        return northPanel;
    }

    private JPanel createCenterPanel()
    {
        centerPanel = new JPanel();

        GridBagLayout gbl = new GridBagLayout();
        GridBagConstraints gbc = new GridBagConstraints();

        centerPanel.setLayout(gbl);

        //creating a jpanel for gender radio buttons
        JPanel genderPanel = new JPanel();
        genderPanel.setLayout(new FlowLayout());
        genderPanel.add(genderLabel);
        genderPanel.add(maleRadio);
        genderPanel.add(femaleRadio);

        gbc.gridx = 1;
        gbc.gridy = 1;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(heightLabel,gbc);

        gbc.gridx = 2;
        gbc.gridy = 1;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(heightTxt,gbc);

        gbc.gridx = 3;
        gbc.gridy = 1;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(weightLabel,gbc);

        gbc.gridx = 4;
        gbc.gridy = 1;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(weightTxt,gbc);

        gbc.gridx = 1;
        gbc.gridy = 2;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(waistLabel,gbc);

        gbc.gridx = 2;
        gbc.gridy = 2;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(waistTxt,gbc);

        gbc.gridx = 3;
        gbc.gridy = 2;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(neckLabel,gbc);

        gbc.gridx = 4;
        gbc.gridy = 2;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(neckTxt,gbc);

        gbc.gridx = 5;
        gbc.gridy = 2;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(hipsLabel,gbc);

        gbc.gridx = 6;
        gbc.gridy = 2;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(hipsTxt,gbc);

        gbc.gridx = 1;
        gbc.gridy = 3;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(genderLabel,gbc);

        gbc.gridx = 2;
        gbc.gridy = 3;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,5,0,0);
        centerPanel.add(maleRadio,gbc);

        gbc.gridx = 3;
        gbc.gridy = 3;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15,-10,0,0);
        centerPanel.add(femaleRadio,gbc);

        gbc.gridx = 1;
        gbc.gridy = 4;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(50,5,0,0);
        centerPanel.add(valuesLabel,gbc);



        return centerPanel;


    }
}

如您所见，JRadio 按钮“女性”隐藏了一部分，一旦您移动光标，它就会完全显示出来。我猜这是因为它在“插图”中使用了负间距。

但是我这样做是为了减少 2 个单选按钮之间的差距。男性在gridx = 2，女性在gridx = 3，按钮之间的空间很大。所以我在插图中使用了负空间来减少空间，不幸的是它是这样的。

我尝试将 JLabel、maleRadio 和 femaleRadio 添加到具有 flowlayout 的单独 JPanel 中，并将其放入 gbc.gridx = 2; gbc.gridy = 3;。通过将gridy = 3 中的所有单元格匹配到新 JPanel 的宽度，这让一切变得更糟。

请帮助我缩小这 2 个 JRadio 按钮之间的差距，没有任何问题。谢谢。

【问题讨论】：

  • Please have a look at the following code-- 您的代码太长且笨拙，无法一目了然，如需更好的帮助，请尽快发布SSCCE
  • As you can see, the JRadio button-- 我们看不到任何东西，请针对您遇到的问题发布屏幕截图。
  • @Sepala ：使用同一个 GridBagConstraints 的对象有什么意义，如果您必须再次编写整个代码，请尝试跳过您已经设置的值，只使用那些您需要重新应用的值

标签： java swing jpanel gridbaglayout jradiobutton


【解决方案1】：

  • 不要扩展JFrame，而是创建一个实例并使用它。

  • 我还看到您将单选按钮添加到面板，但您没有添加面板，而是将单选按钮重新添加到 centerpanel？选择一种方式失去另一种方式（尽管我认为这可能是在试图解决问题时发生的？）

  • SSCCE 最重要的是可编译（通过正确的语法且没有编译错误）和可运行（通过主方法并且没有运行时异常（除非这就是问题 :P) - 就像您对图像的阅读一样 - 请找到一种方法来包含资源，即链接到带有徽标的 URL，或者使方法返回与徽标大小相同的简单图像，或者干脆将其省略）。

问题出在这里：

    gbc.gridx = 3;
    gbc.gridy = 3;
    gbc.fill = GridBagConstraints.BOTH;
    gbc.insets = new Insets(15, -10, 0, 0);
    centerPanel.add(femaleRadio, gbc);

-10 绝对不应该存在（可能是错字？），因为这会导致它重叠或在这种情况下 underlap 另一个组件，而是使用大于或等于 0 的任何值：

    gbc.gridx = 3;
    gbc.gridy = 3;
    gbc.fill = GridBagConstraints.BOTH;
    gbc.insets = new Insets(15, 10, 0, 0);
    centerPanel.add(femaleRadio, gbc);

这会给我们：

更新：

还要注意GridBagContsraints 和gridx 等从0 开始而不是1。

+1 对@Gagandeeps balis 评论重用已设置且在GridBagConstraints 中相同的值，这是您的代码，其中包含所有讨论过的修复：

import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

class Form {

    private JLabel heightLabel, weightLabel, waistLabel, neckLabel, hipsLabel, genderLabel, valuesLabel, bfPercentageLabel;
    private JLabel logoLabel;
    private ImageIcon logo;
    private JTextField heightTxt, weightTxt, waistTxt, neckTxt, hipsTxt;
    private JRadioButton maleRadio, femaleRadio, inchesRadio, cmRadio;
    private ButtonGroup genderGroup, valuesGroup;
    private JComboBox percentageCombo;
    private JPanel centerPanel, northPanel, southPanel;

    public Form() {
        //Declaring instance variables  
        heightLabel = new JLabel("Height: ");
        weightLabel = new JLabel("Weight: ");
        waistLabel = new JLabel("Waist: ");
        neckLabel = new JLabel("Neck: ");
        hipsLabel = new JLabel("Hips: ");
        genderLabel = new JLabel("Gender: ");
        valuesLabel = new JLabel("Values in: ");

        logoLabel = new JLabel();
        //logo = new ImageIcon(getClass().getResource("/images/calc_logo_final_2_edit.gif"));
        //logoLabel.setIcon(logo);

        heightTxt = new JTextField(10);
        weightTxt = new JTextField(10);
        waistTxt = new JTextField(10);
        neckTxt = new JTextField(10);
        hipsTxt = new JTextField(10);

        maleRadio = new JRadioButton("Male");
        femaleRadio = new JRadioButton("Female");
        genderGroup = new ButtonGroup();
        genderGroup.add(maleRadio);
        genderGroup.add(femaleRadio);

        inchesRadio = new JRadioButton("Inches");
        cmRadio = new JRadioButton("Centimeters");
        valuesGroup = new ButtonGroup();
        valuesGroup.add(inchesRadio);
        valuesGroup.add(cmRadio);

        percentageCombo = new JComboBox();
        percentageCombo.addItem("No Value is Set");

        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(createNorthPanel(), "North");
        frame.add(createCenterPanel(), "Center");
        frame.setResizable(false);
        frame.pack();
        frame.setVisible(true);


    }

    private JPanel createNorthPanel() {
        northPanel = new JPanel();
        northPanel.setLayout(new FlowLayout());
        northPanel.add(logoLabel);

        return northPanel;
    }

    private JPanel createCenterPanel() {
        centerPanel = new JPanel(new GridBagLayout());

        GridBagLayout gbl = new GridBagLayout();
        centerPanel.setLayout(gbl);

        GridBagConstraints gbc = new GridBagConstraints();
        gbc.fill = GridBagConstraints.BOTH;
        gbc.insets = new Insets(15, 5, 0, 0);

        gbc.gridx = 0;
        gbc.gridy = 0;
        centerPanel.add(heightLabel, gbc);
        gbc.gridx = 1;
        centerPanel.add(heightTxt, gbc);
        gbc.gridx = 2;
        centerPanel.add(weightLabel, gbc);
        gbc.gridx = 3;
        centerPanel.add(weightTxt, gbc);

        gbc.gridx = 0;
        gbc.gridy = 1;
        centerPanel.add(waistLabel, gbc);
        gbc.gridx = 1;
        centerPanel.add(waistTxt, gbc);
        gbc.gridx = 2;
        centerPanel.add(neckLabel, gbc);
        gbc.gridx = 3;
        centerPanel.add(neckTxt, gbc);
        gbc.gridx = 4;
        centerPanel.add(hipsLabel, gbc);
        gbc.gridx = 5;
        centerPanel.add(hipsTxt, gbc);

        gbc.gridx = 0;
        gbc.gridy = 2;
        centerPanel.add(genderLabel, gbc);
        gbc.gridx = 1;
        centerPanel.add(maleRadio, gbc);
        gbc.gridx = 2;
        centerPanel.add(femaleRadio, gbc);

        gbc.gridx = 0;
        gbc.gridy = 3;
        gbc.insets = new Insets(50, 5, 0, 0);
        centerPanel.add(valuesLabel, gbc);

        return centerPanel;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new Form();
            }
        });
    }
}

【讨论】：

  • 呵呵，在浏览代码时偶然发现了这个问题，起初我被难住了：P
  • 我刚刚也收到了这个东西，刚刚想把它当作评论，但发现你已经回答了:-)
  • @DavidKroukamp：感谢大卫的回复。但这就是我所说的情况。看，男性和女性单选按钮之间的差距太大了。因此，我使用负值来缩小差距。
  • @Sepala 尝试将它们全部设置为 0？我在谈论有问题的标签和 2 个单选按钮？这是在不使用负重叠​​组件的情况下使用当前LayoutManager（不是我是 GridBag 大师 :)）的最佳最小间隙。也许尝试嵌套LayoutManagers 以实现您想要的外观。也看看我的更新。
  • @Sepala ：试试这个JRadioButton.setMargin()，希望这可能会有所帮助。
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